Statistical networks emerging from link-node interactions

Details Statistical networks emerging from link-node interactions Statistical networks emerging from link-node interactions

2005-11-04

arxiv.org/abs/cond-mat/0511133v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 1 figure

Scientific paper

10.1209/epl/i2006-10212-8

We study a model for a statistical network formed by interactions between its nodes and links. Each node can be in one of two states (Ising spin up or down) and the node-link interaction facilitates linking between the like nodes. For high temperatures the influence of the nodes on the links can be neglected, and we get the Ising ferromagnet on the random (Erdos-Renyi) graph. For low temperatures the nodes get spontaneously ordered. Due to this, the connectivity of the network enhances and links having a common node are correlated. The emerged network is clustered. The node-link interaction shifts the percolation threshold of the random graph to much smaller values, and the very percolation transition can become of the first order: the giant cluster coexist with the unconnected phase leading to bistability and hysteresis. The model can be applied to the striction phenomena in magnets and to studying opinion formation in the sociophysical context.

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